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Dietary supplement

Taurine Ingredients & Drug Interactions

by NOW

Taurine label
See full label image
Powder Category: Amino Acid/protein
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Taurine against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Taurine is a dietary supplement by NOW with 1 active ingredient. Its ingredients are commonly taken for exercise performance and endurance, heart health, energy support.Based on those ingredients, 173 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Taurine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Taurine by NOW

Ask about any prescription or over-the-counter medication and we check it for interactions with Taurine by NOW — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Taurine by NOW

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Sep 17, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

NOW Taurine Powder contains one active ingredient: taurine, an amino acid that your body makes naturally and also gets from animal foods like meat and fish. The product has no other inactive ingredients.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed

This product doesn't appear to be marketed for a specific use, so we graded Taurine's overall clinical evidence instead.

Moderate

Some clinical evidence supports Taurine for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Congestive heart failure (CHF) — rated "Possibly Effective" (Natural Medicines).
  • On file: Hepatitis — rated "Possibly Effective" (Natural Medicines).

The evidence on taurine is mixed. It's rated possibly effective for hepatitis and congestive heart failure (CHF), meaning some clinical data suggest benefit, but more research is needed to be sure.

For weight loss, the data suggests it's possibly ineffective. The facts we have don't cover other potential uses you may have read about, so if you're considering this for something else, that's worth discussing with your doctor or pharmacist.

The evidence, ingredient by ingredient Taurine

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Taurine is generally well tolerated when taken by mouth in typical doses for up to a year. The most common side effects are constipation, diarrhea, and indigestion.

Serious reactions are rare, though allergic reactions have been reported in people with a history of sulfa or sulfite allergies. Long-term safety beyond one year is less certain, and we don't have enough data on supplement doses to say for sure it's safe long-term — use it only under medical guidance.

For breastfeeding, taurine occurs naturally in breast milk, but the safety of taking a supplement while nursing isn't well studied. There's not enough data to know either way, so talk with your doctor or pharmacist before starting it if you're nursing.

Side effects, ingredient by ingredient Taurine

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Taurine.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: lithium.
  • For scale: 173 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Check with your doctor or pharmacist before taking this product if you're on blood pressure medications (antihypertensives) or lithium. Both show Moderate interaction risk with taurine: blood pressure drugs could drop too low, and lithium levels could rise to unsafe ranges.

The search tool on this page can help you confirm your specific medications.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

Consider NOW Taurine if your doctor or pharmacist thinks it might help with hepatitis or heart failure, or if you want a natural source of this amino acid. Be cautious if you take blood pressure medication or lithium — both need a careful check first.

Talk it over with your own doctor or pharmacist before starting, especially if you're on any prescriptions or planning to use it long-term.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Nov 24, 2015.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Taurine, straight from the product label.

Brand NOW
Barcode (UPC) 733739002600
Net contents 8 oz.; 227 Gram(s)
Market status On market
Date entered into DSLD Nov 24, 2015
DSLD ID 53457
Product type Amino Acid/protein
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Gluten Free, Dairy Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Taurine by NOW, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
0.25 tsp
Maximum serving Sizes:
0.25 tsp
Servings per container
227
UPC/BARCODE
733739002600
IngredientAmount% DV
Taurine1 Gram(s)--

Other ingredients: None

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
FDA Statement of Identity

A Dietary Supplement

Formulation

Vegetarian/Vegan

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.

General Statements

Amino Acids

Family owned since 1968.

This product is sold by weight not volume.

Please Recycle.

Taurine is a conditionally essential amino acid that is not utilized for protein synthesis, but is mainly found free in most tissues, especially throughout the nervous system.* It functions in tissues by stabilizing cell membranes and aiding the transport of potassium, sodium, calcium and magnesium in and out of cells.* Taurine helps to generate and regulate nerve impulses and supports the maintenance of normal fluid balance; it is also used by the body in visual pathways, as well as in the brain and nervous system, where it works together with glycine and GABA as a neurotransmitter.*

Natural color variation may occur in this product.

Pure Powder

Nervous System Health*

Healthy Visual Function*

Precautions

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Caution: For adults only.

Consult physician if pregnant/nursing, taking medication (including anti-hypertensive and diuretic medications), or have a medical condition (including hypotension).

Keep out of reach of children.

Do Not Eat Freshness Packet Enclosed.

Storage

Store in a cool, dry place after opening.

Seals/Symbols

GMP QUALITY ASSURED

Non-GMO

Suggested/Recommended/Usage/Directions

Suggested Usage: Take 1/4 level teaspoon 1 to 2 times daily with juice or water, preferably between meals.

FDA Disclaimer Statement

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

General

CODE 0260 V6

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Taurine by NOW label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Taurine label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Taurine by NOW

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size0.25 tsp Dosage formPowder Servings per container227 Amounts shown are per serving.

Taurine

Interacts with
173 drugs
1 Gram(s) per serving

Taurine is an amino acid your body makes naturally and that you also get from animal foods. It is widely used in energy drinks and sports supplements,...

Taurine monograph & interactions

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

Taurine by NOW Drug Interactions

Want to check YOUR meds against Taurine?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
173Drugs
173 Moderate

Ingredients driving the most interactions

Taurine 173

Individual Drug Interactions

The ingredients in Taurine interact with 173 drugs. Click any drug to see the details.

1 of the 1 ingredient in Taurine interact with drugs. Each result below shows which ingredient is responsible. Taurine

Each ingredient & the kinds of drugs it affects

For each ingredient in Taurine with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Taurine2 drug types · 173 drugs

Antihypertensive Drugs

Theoretically, taurine might increase the risk of hypotension when taken with antihypertensive drugs.
Some clinical evidence suggests that taurine can reduce both systolic and diastolic blood pressure.

Likelihood Probable Evidence D
Lithium

Theoretically, taurine might reduce excretion and increase plasma levels of lithium.
Taurine is thought to have diuretic properties, which might reduce the excretion of lithium.

Likelihood Probable Evidence D
Taurine full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Taurine, from the product label.

NOW

See all NOW products
Name
NOW Foods
Street Address
395 S. Glen Ellyn Rd.
City
Bloomingdale
State
IL
ZipCode
60108
Web Address
nowfoods.com
Pharmacist Counseling Corner

Taurine by NOW: Common Questions

Does Taurine by NOW interact with any medications?
Yes. Based on its ingredients, Taurine has a known interaction with 173 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Taurine contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is taurine safe while breastfeeding?
Taurine occurs naturally in breast milk, but we don't have enough data on supplement safety while nursing. Talk with your doctor or pharmacist before taking it — they can weigh what you need against what's known and help you decide what's right for you.
What are the most common side effects?
Constipation, diarrhea, and indigestion are the most common. Taurine is generally well tolerated in typical doses for up to a year. Serious reactions are rare, though allergic reactions can happen — especially in people sensitive to sulfa drugs or sulfites.
Does taurine actually help with weight loss?
The evidence suggests it's possibly ineffective for weight loss. If that's your main goal, talk with your doctor or pharmacist about what might work better.
Can I take this long-term?
Taurine is well tolerated for up to a year in typical doses, but long-term safety beyond that is less certain. Use it only under medical guidance if you're planning to take it for months or years.
How much taurine is in each serving?
The product facts don't specify the dose per serving. Check the label on your bottle for the serving size and amount of taurine.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Taurine label
Go deeper

The Full Monographs Behind Taurine’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Taurine

Interacts with 173 drugs

Taurine is an amino acid your body makes naturally and that you also get from animal foods. It is widely used in energy drinks and sports supplements, and short-term use appears generally sa...

Read the full Taurine monograph →
Sources

Sources & How We Checked

Taurine's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 21 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Taurine 21 references
  1. Ahmad S, Robertson HT, Golper TA, et al. Multicenter trial of L-carnitine in maintenance hemodialysis patients. II. Clinical and biochemical effects. Kidney Int 1990;38:912-8. PubMed
  2. Machado-Vieira R, Viale CI, Kapczinski F. Mania associated with an energy drink: the possible role of caffeine, taurine, and inositol. Can J Psychiatry 2001;46:454-5. PubMed
  3. Obermann M, Schorn CF, Mummel P, et al. Taurine induced toxic encephalopathy? Clin Neurol Neurosurg 2006;108:812-3. PubMed
  4. Bichler, A., Swenson, A., and Harris, M. A. A combination of caffeine and taurine has no effect on short term memory but induces changes in heart rate and mean arterial blood pressure. Amino Acids 2006;31(4):471-476. PubMed
  5. Iyadurai, S. J. and Chung, S. S. New-onset seizures in adults: possible association with consumption of popular energy drinks. Epilepsy Behav 2007;10(3):504-508. PubMed
  6. Berger, A. J. and Alford, K. Cardiac arrest in a young man following excess consumption of caffeinated "energy drinks". Med J Aust. 1-5-2009;190(1):41-43. PubMed
  7. Worthley, M. I., Prabhu, A., De, Sciscio P., Schultz, C., Sanders, P., and Willoughby, S. R. Detrimental effects of energy drink consumption on platelet and endothelial function. Am J Med 2010;123(2):184-187. PubMed
  8. Morchon, Simon D. and Perez Castrillon, J. L. [Hypoglycemia by intake of taurine]. Rev.Clin Esp. 2010;210(1):49.
  9. Livshits, Z., Hoffman, R. S., Hymes, K. B., and Nelson, L. S. If vitamins could kill: massive hemolysis following naturopathic vitamin infusion. J Med Toxicol. 2011;7(3):224-226. PubMed
  10. Schoffl, I., Kothmann, J. F., Schoffl, V., Rupprecht, H. D., and Rupprecht, T. "Vodka energy": too much for the adolescent nephron? Pediatrics 2011;128(1):e227-e231. PubMed
  11. Calabro, R. S., Italiano, D., Gervasi, G., and Bramanti, P. Single tonic-clonic seizure after energy drink abuse. Epilepsy Behav 2012;23(3):384-385. PubMed
  12. Fujita, T., Ando, K., Noda, H., Ito, Y., and Sato, Y. Effects of increased adrenomedullary activity and taurine in young patients with borderline hypertension. Circulation 1987;75(3):525-532. PubMed
  13. Darling, P. B., Lepage, G., Leroy, C., Masson, P., and Roy, C. C. Effect of taurine supplements on fat absorption in cystic fibrosis. Pediatr Res 1985;19(6):578-582. PubMed
  14. Fukuyama, Y. and Ochiai, Y. Therapeutic trial by taurine for intractable childhood epilepsies. Brain Dev. 1982;4(1):63-69. PubMed
  15. Franconi, F., Bennardini, F., Mattana, A., Miceli, M., Ciuti, M., Mian, M., Gironi, A., Anichini, R., and Seghieri, G. Plasma and platelet taurine are reduced in subjects with insulin-dependent diabetes mellitus: effects of taurine supplementation. Am.J. DOI
  16. Stohs SJ, Miller M. A case study involving allergic reactions to sulfur-containing compounds including, sulfite, taurine, acesulfame potassium and sulfonamides. Food Chem Toxicol. 2014 Jan;63:240-3. PubMed
  17. Sun Q, Wang B, Li Y, Sun F, et al. Taurine supplementation lowers blood pressure and improves vascular function in prehypertension: randomized, double-blind, placebo-controlled study. Hypertension 2016 Mar;67(3):541-9. PubMed
  18. Jang ES, Hwang SH, Kim JW, Jeong SH. Effectiveness of 4-week oral taurine treatment for muscle cramps in patients with liver cirrhosis: a single-arm pilot study. Yonsei Med J 2021;62(1):21-8. PubMed
  19. Guan L, Miao P. The effects of taurine supplementation on obesity, blood pressure and lipid profile: A meta-analysis of randomized controlled trials. Eur J Pharmacol 2020;885:173533. PubMed
  20. Higgins JP, Liras GN, Liras IN, et al. Energy Drink Effects on Hemodynamics and Endothelial Function in Young Adults. Cardiology. 2021;146(2):258-262. PubMed
  21. Pallangyo P, Bhalia SV, Komba M, et al. Acute Myocardial Infarction Following the Consumption of Energy Drink in a 28-Year-Old Male: A Case Report. J Investig Med High Impact Case Rep. 2023 Jan-Dec;11:23247096231168811. PubMed

See these in context on the Taurine monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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